From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-yb1-f202.google.com (mail-yb1-f202.google.com [209.85.219.202]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 446D21D639C for ; Thu, 11 Apr 2024 17:04:18 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.219.202 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1712855059; cv=none; b=fN+HTDWW2wptD3HMRmltJvEQb+dEgg7B6HQmR2ow1q4q+3fQqjmnTo1t0SaIhABn5xJfjd0J5EehKMPXoLLx9sAFdFu4893eXpl8XWlMG1Uf5mT2U+zB0kIXoO/w231BgBjVUvzdEzhOfHuhaMwBcEDVgXNgJbntX7N512Y2xng= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1712855059; c=relaxed/simple; bh=QElmSC3bxNhYYUYZcpYqZWOnauAT+nnkD1ECMHNRsa0=; h=Date:In-Reply-To:Mime-Version:References:Message-ID:Subject:From: To:Cc:Content-Type; b=c+0BKcxqR/q7UvAvVcNtz0AAFtIEBSF0J09zf0WXOZq1nuI+xz5TItL3qWWa5aeiSjXZhJvx4QAky4nOcFS2fRRj3r4FRQbJBDtWOza8Haz75BDila1JhDotl1SAm/dTy1umZa3L1aNvaFuRjUqxetUJfWFyUW7PsColZGFiKFs= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=google.com; spf=pass smtp.mailfrom=flex--seanjc.bounces.google.com; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b=XjuyDxQs; arc=none smtp.client-ip=209.85.219.202 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=google.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=flex--seanjc.bounces.google.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b="XjuyDxQs" Received: by mail-yb1-f202.google.com with SMTP id 3f1490d57ef6-dc64f63d768so36984276.2 for ; Thu, 11 Apr 2024 10:04:18 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20230601; t=1712855057; x=1713459857; darn=vger.kernel.org; h=cc:to:from:subject:message-id:references:mime-version:in-reply-to :date:from:to:cc:subject:date:message-id:reply-to; bh=wcI+w0jxD+jVMQpaBlv4eiJI48tJxddyR3AVpCAV8/0=; b=XjuyDxQsySmT1aw1XMjeSVmD0QOsLb5/m620JgishPaNvmKOy0iYE6RMeEhK1kUuww joHO6iZFRrWYwMUBTjwwFRfoVZN0RZ7X+pu8UFuW/p4O2++lr/zyAKgFVkPdN12iGogn RDw5tlt+wLQU4Xp5e/02kckNPaPXs/WYYWyfW15ATB6if2FfZn59cKlzBAMffYsN/tw+ 4gvXDj0/5/B0jMNvSHBcODIllPwWMYa+jHKPPVQgfcshI3XT9izok3B+LigxOkGTVmqc Al89od5Rkb2bR8L3Qd0iN60VzAIR2WXNdlgMmiNketcYXZ4nX57eA9eJoRKKAGZ0Vrbb wYlg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1712855057; x=1713459857; h=cc:to:from:subject:message-id:references:mime-version:in-reply-to :date:x-gm-message-state:from:to:cc:subject:date:message-id:reply-to; bh=wcI+w0jxD+jVMQpaBlv4eiJI48tJxddyR3AVpCAV8/0=; b=a5ypJmTrpi7B+fmfXXab10KvpY5hQGbbtVDG6HsyvvpbKNUavHw5/twqz6Cc+T1sIg D/GqjG7/9EXHFS+Qzr58s8Bbli5OZTgoxPv9npbn11sX+QdmucoW3lIm/TaCfO0ip/s7 Y9535rK6YNoocilF/4ZLCwZoixXH43zYow1Brg/tJlqYqXDxNRujb+CpHetZbVer78w+ s8xb94dcEFnu1uFhAsQ/WMYo4HJ5rEYju11WWyZbzPyPM2k6eBK6i0DFecIdfcn9kBsC c//HCrqoMDg5UcAVVajF1JXI0xBn9N9HSyyHkrZjZ5D/GPMddGGVtUkLPylYnN8kUCvU HUwA== X-Forwarded-Encrypted: i=1; AJvYcCXXGSbL61qL5yovEKLreZeHnIQuaTmsyTffSTIp0Pq4gf35wvySAP0pPzall+NDqEdJ1F6HH9O4Bk59bkh58r9UaF8X X-Gm-Message-State: AOJu0YyLW9Y5C8EzGSaquMEbJd4KmSEP/s59PAJd+uRzB6GGQrfEjFEn iGKKmJ7tQItljkefCwbku/B9hgniWvdT0sA70oWnz3jTWhm66J4YNUmWgdjJbeG0q20bc+0nZYK arg== X-Google-Smtp-Source: AGHT+IF+kQ/A1q51nGdz/1jgB0BZ4jm+Y8FVRBtTG7jOydoNQbvoOHP3rKC1bCcsOLvoRnXL34a7l/KFutg= X-Received: from zagreus.c.googlers.com ([fda3:e722:ac3:cc00:7f:e700:c0a8:5c37]) (user=seanjc job=sendgmr) by 2002:a05:6902:100b:b0:dcd:875:4c40 with SMTP id w11-20020a056902100b00b00dcd08754c40mr23995ybt.10.1712855057304; Thu, 11 Apr 2024 10:04:17 -0700 (PDT) Date: Thu, 11 Apr 2024 10:04:15 -0700 In-Reply-To: <20240126085444.324918-2-xiong.y.zhang@linux.intel.com> Precedence: bulk X-Mailing-List: kvm@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: Mime-Version: 1.0 References: <20240126085444.324918-1-xiong.y.zhang@linux.intel.com> <20240126085444.324918-2-xiong.y.zhang@linux.intel.com> Message-ID: Subject: Re: [RFC PATCH 01/41] perf: x86/intel: Support PERF_PMU_CAP_VPMU_PASSTHROUGH From: Sean Christopherson To: Xiong Zhang Cc: pbonzini@redhat.com, peterz@infradead.org, mizhang@google.com, kan.liang@intel.com, zhenyuw@linux.intel.com, dapeng1.mi@linux.intel.com, jmattson@google.com, kvm@vger.kernel.org, linux-perf-users@vger.kernel.org, linux-kernel@vger.kernel.org, zhiyuan.lv@intel.com, eranian@google.com, irogers@google.com, samantha.alt@intel.com, like.xu.linux@gmail.com, chao.gao@intel.com, Kan Liang Content-Type: text/plain; charset="us-ascii" On Fri, Jan 26, 2024, Xiong Zhang wrote: > From: Kan Liang > > Define and apply the PERF_PMU_CAP_VPMU_PASSTHROUGH flag for the version 4 > and later PMUs Why? I get that is an RFC, but it's not at all obvious to me why this needs to take a dependency on v4+.